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Tandem Diabetes Care
TNDM

Overview Fund Activity

266 hedge funds and large institutions have $1.5B invested in Tandem Diabetes Care in 2025 Q2 according to their latest regulatory filings, with 40 funds opening new positions, 115 increasing their positions, 68 reducing their positions, and 41 closing their positions.

Holders
266
Holders Change
-6
Holders Change %
-2.21%
% of All Funds
3.57%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.03%
New
40
Increased
115
Reduced
68
Closed
41
Calls
$53.9M
Puts
$4.33M
Net Calls
+$49.6M
Net Calls Change
-$6.58M

Top Buyers

1
OAM
1
Ophir Asset Management
Australia
$24.4M
2
Goldman Sachs
2
Goldman Sachs
New York
$35.2M
3
Millennium Management
3
Millennium Management
New York
$18.1M
4
Two Sigma Investments
4
Two Sigma Investments
New York
$23M
5
Walleye Capital
5
Walleye Capital
New York
$10.6M

Top Sellers

1
PWAM
1
Park West Asset Management
California
$0
2
Fidelity Investments
2
Fidelity Investments
Massachusetts
$9.78M
3
FAM
3
Fred Alger Management
New York
$12.4M
4
Balyasny Asset Management
4
Balyasny Asset Management
Illinois
$4.3M
5
KCM
5
Kingdon Capital Management
New York
$0
Name Market Value Shares Shares
Change 		Shares
Change %
FAM
26
Fred Alger Management
New York
$12.4M 667,345 -786,894 -54%
NL
27
Nuveen LLC
North Carolina
$11.7M 628,497 +320,182 +104%
Charles Schwab
28
Charles Schwab
California
$11.5M 617,000 +46,850 +8%
Walleye Capital
29
Walleye Capital
New York
$10.6M 567,223 +567,223 New
Barclays
30
Barclays
United Kingdom
$10.6M 567,072 +53,066 +10%
JPMorgan Chase & Co
31
JPMorgan Chase & Co
New York
$10.5M 562,254 +328,489 +141%
BCM
32
Brown Capital Management
Maryland
$10.3M 551,207 -39,807 -7%
Royal Bank of Canada
33
Royal Bank of Canada
Ontario, Canada
$10.2M 549,542 +337,876 +160%
Bank of America
34
Bank of America
North Carolina
$10.2M 545,504 +78,774 +17%
AG
35
Algert Global
California
$9.9M 530,914 +321,594 +154%
Fidelity Investments
36
Fidelity Investments
Massachusetts
$9.78M 524,675 -912,401 -63%
Ameriprise
37
Ameriprise
Minnesota
$7.81M 419,037 +31,150 +8%
ECM
38
ExodusPoint Capital Management
New York
$7.78M 417,308 +401,322 +2,510%
Prudential Financial
39
Prudential Financial
New Jersey
$7.7M 382,804 +210,740 +122%
Bank of New York Mellon
40
Bank of New York Mellon
New York
$7.44M 399,003 -8,479 -2%
Principal Financial Group
41
Principal Financial Group
Iowa
$7.37M 395,226 -4,224 -1%
TI
42
Trexquant Investment
Connecticut
$6.87M 368,530 +368,530 New
FCM
43
Frontier Capital Management
Massachusetts
$6.79M 364,098 -1,078 -0.3%
BNP Paribas Financial Markets
44
BNP Paribas Financial Markets
France
$6.75M 361,878 -97,920 -21%
Acadian Asset Management
45
Acadian Asset Management
Massachusetts
$6.68M 358,516 +125,644 +54%
Aberdeen Group
46
Aberdeen Group
United Kingdom
$6.64M 356,218 – –
Citadel Advisors
47
Citadel Advisors
Florida
$6.58M 352,959 +238,925 +210%
SAM
48
Silvercrest Asset Management
New York
$6.45M 346,160 +65 +0%
Renaissance Technologies
49
Renaissance Technologies
New York
$6.38M 342,327 +56,200 +20%
D.E. Shaw & Co
50
D.E. Shaw & Co
New York
$6.31M 338,668 +338,668 New
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